68509541 has 4 divisors (see below), whose sum is σ = 72539532. Its totient is φ = 64479552.

The previous prime is 68509537. The next prime is 68509543. The reversal of 68509541 is 14590586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18241441 + 50268100 = 4271^2 + 7090^2 .

It is a cyclic number.

It is not a de Polignac number, because 68509541 - 2² = 68509537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68509495 and 68509504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68509543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014970 + ... + 2015003.

It is an arithmetic number, because the mean of its divisors is an integer number (18134883).

Almost surely, 2^68509541 is an apocalyptic number.

It is an amenable number.

68509541 is a deficient number, since it is larger than the sum of its proper divisors (4029991).

68509541 is a wasteful number, since it uses less digits than its factorization.

68509541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4029990.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 68509541 is about 8277.0490514434. The cubic root of 68509541 is about 409.1824696981.

The spelling of 68509541 in words is "sixty-eight million, five hundred nine thousand, five hundred forty-one".